<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title></title>
		<link rel="stylesheet" href="./Bootstrap4.6.1/css/bootstrap.css">
		<script src="./Bootstrap4.6.1/js/jquery.js"></script>
		<script src="./Bootstrap4.6.1/js/bootstrap.bundle.js"></script>
	</head>
	<body>
		<div class="container border border-danger">
			<div class="w-25 p-3" style="background-color: #eee;">25% 的宽度</div>
			<div class="w-50 p-3" style="background-color: #eee;">50% 的宽度</div>
			<div class="w-75 p-3" style="background-color: #eee;">75% 的宽度</div>
			<div class="w-100 p-3" style="background-color: #eee;">100% 的宽度</div>
			<div class="w-auto p-3" style="background-color: #eee;">Width auto</div>
		</div>
		<div class="container border border-danger">
			<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
			  <div class="h-25 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,0.1)">Height 25%</div>
			  <div class="h-50 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 50%</div>
			  <div class="h-75 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 75%</div>
			  <div class="h-100 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 100%</div>
			  <div class="h-auto d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height auto</div>
			</div>
		</div>
	</body>
</html>